Index. 



Wagner, Moritz, on geographical 

 distribution, 216. 



Wallace, A. K., on origin of 

 species as coincident in time 

 and space with pre-existing and 

 allied species, 22 ; on wingless 

 insects, 70 ; on absence of hair 

 from hrmnn back, and function 

 of on arms of orang, 89 ; on 

 geographical distribution, 207, 

 331, 232, 233, 243; on natural 

 selection, 256 ; on recognition 

 marks, 271-273; on alleged de- 

 ductive consequences of the na- 

 tural selection theory, 273-276; 

 his theory of warning colours, 

 323, 324 ; on sexual selection, 

 391-400, 450; his principal 

 defect in treating of animal 

 colouration, 449, 450- 



Warning colours, 323-326. 



Wasp, imitated by a fly, 329. 



Water-cress, multiplication of, u 



New Zealand, 286. 

 Weevils, on St. Helena, 232. 

 Weismann, his theory of heredity, 



130, 134. 

 W r ells, Dr., on natural selection, 



257- 

 Wetterhan, Prof., on vegetable 



galls, 448. 



Whales, 38, 50, 53, 54, 65, 180. 

 Whewell, on natural selection, 



257. 258, 443-445- 

 Wings, 54-56, 60, 61, 68-70,355. 

 W r olf, Tasmanian, dentition of, 34. 

 Wood, John, on vestigial muscles 



in man, 77- 



Woodward, on fossil cirripedos,43 1. 

 Woolner, on the human ear, 86. 

 Worms, embryology of, 155. 

 Wyman, Prof., on the great toe oi 



human embryo, 79, 80. 



Zona pellucida, 121. 



